1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d17363a38ad2e60c00f17fdb75052efaabde5ffc81bf6d983859d70fd8d08e7. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d3367a1-f9dd-49f1-afc3-4f82637652ca.json and https://artists.proofprofile.net/proofs/artist/8d3367a1-f9dd-49f1-afc3-4f82637652ca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7be660151afb414afdedf27f785b7c019a601fcf6098ea05b0821b14668ffda. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MYUM81505680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c558439169028f2c44579e3da74f07b7f166fe30ac7ba8f3fb1b757579eb26. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MYUM81505681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fdb84aecceb1b3f4c37e228f04b63099016cb6de0c9fb410e7cad72aa36fcd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MYUM81505682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9110472d43ed3e5bc2f2ffda300024dd844ed5c392cfd5162a89c16f1cdd0187. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MYUM81505683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72796822bd03e98549a3c459c4feaf672a10f90ce1aaaad0b7742b01b9372681. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MYUM81505684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce67a8c5882783c8a3faaa777f283ff37a86960bf5a4454a155f6dcc9aedc91. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MYUM81505685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c5c2322834de1c983fabeedf0bec2008e068dfa41f469cc99b5a8303b23888. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MYUM81505686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64c81cd2c6ad9b525f1ac585c2d9218512de9c20392b997be9eda0dc644afe4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MYUM81505687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46aa7ef7970fb7f09066db17dc58ff171c1a187da49a1393ec7ca163d46158f5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MYUM81505688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b0fc38ce677ca5d0195ab4f02e20481b3fa52eff82e9b4b64fccc2f5f9fa03. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MYUM81505689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3355d3df36c1920e480533bb0209ff7069c78adb9429b2009897b6182630f6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MYUM81505690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cde00698fa6af1983d9fdfa2ba8d023e9d6402602e7814b019d0a0ca1e2ca7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MYUM81505691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872a9292a14cbb01d92df8243785b815ea363ff22e371a4f8554f01ade0b97cc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MYUM81706890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279d6f05bcef5d5429f1034f860928d1cb99a4fdcae0aa57ea93e6e256bca8d8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MYUM81706891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a29799d75eb8b06430cd0eed1f67e861c3664ab6c7bb4ffbad56ef07d1997d. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MYUM81706892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5229526429d291beb278f3718a404efa77acdf663bbe290f38136e9b8db66280. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MYUM81706893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a95442582556a538e19e470c5e940df6007f3dbf56df153784c8d9c3a4c1e71. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MYUM81706894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66336a2ce066f363d9759f0b8d36fd8f91f4ce55c40824c193aaf951f986f799. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MYUM81606886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb0e67535dd5f75e11c3541ec73cc89a024bac4ea6ba016506504b369d0c8ad. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MYUM81706895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c60303a9c3cd1baac7464366e18f9b77c1c756c8d6567c5436247096bd5a9d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MYUM81706896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3e2906a81bab8471a09274280a14f0f7a9e53e4c6cef74af9c7b4c0567629a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MYUM81405637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd03242328160795d075375fa0080259c1975423bd007c3a88855ff7ab3b556. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MYUM81706897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7d831c468330d1f16ea75808616e94098150ddc4b3ad4ecdb0005aea5f1035. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MYUM81706898.